Poland has mobilized its fighter jets and allied aircraft to patrol its airspace in response to a massive wave of Russian missile and drone strikes on Ukraine. Ensure SecurityThis escalation has prompted heightened vigilance along Poland’s borders to ensure its national security.

A Russian strike on a nine-storey building in the city of Sumy in northern Ukraine killed eight people and wounded dozens, an official said Sunday, as Russia launched a massive drone and missile attack described by officials as the largest in recent months.